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Cryptocurrency – a digital currency based on decentralized blockchain technology has been controversial since the creation of the first cryptocurrency, Bitcoin in 2009. While some people believe that it brings a revolutionary technological tool which has the potential to challenge the existing financial architecture or even destroy it all together, others consider it as a classic bubble created by hyped expectations. This review aims at explaining the technique that forms the basis of cryptocurrencies, how they have been implemented in different industries, and the advantages and disadvantages of the technology. Topics include financial accessibility, transaction velocity, and emergence of decentralised finance, notable issues involve unpredictability, the lack of clarity concerning regulation, and concerns about the effects on the environment. Lastly, the paper concludes whether introducing the cryptocurrency is revolutionary in the field of finance or just another fad.